One of the judges gave the points 96–94, in favor of Nicolson. But the two other judges ruled in favor of Brown (97–93, 96–94).
Brown has previously worked as a police officer in Washington DC and in her hometown Fort Myers, Florida, before she committed to boxing full-time.
The 36-year-old American has now gone 19 straight matches without a loss.
But Brown has no thoughts on her next match for the time being.
Right now I just want to go home, eat cupcakes and cookies, and watch cartoons, she says.
